Chamberlain LM21XP - Manual (Page 12)

Disable Yellow The Yellow LED will light when the door reaches the close
limit and activates a proximity switch attached to terminal
positions 7 and 8 on the release device. This
configuration results in the device not releasing the
fusible link assembly in alarm or power loss situations
and should only be used when the fire door is kept in a
constant closed position. If the LED does not light when the door reaches the close
limit and activates the proximity switch, then check that
the proximity switch has been activated and that the
switch is set to normally open (N.O.). Check to make
certain that the switch is attached to terminal positions 7
and 8 on the release device.
Power Red If the Red LED is lit, then the line power is connected and
switched “on.” If the LED does not light when power is applied, check
that power is connected as described in the installation
manual electrical connections.
M A I N T E N A N C E
To avoid SERIOUS PERSONAL INJURY or DEATH from
electrocution, disconnect ALL power BEFORE performing
ANY maintenance.
WARNING
CAUTION WARNING
WARNING
MAINTENANCE REQUIREMENTS
The release device has no scheduled maintenance requirements.
The unit has been designed and tested for use in dry, indoor
locations. Testing of the unit at least once every 90 days is
recommended, but test intervals shall ultimately be subject to
criteria established by the Authority Having Jurisdiction (AHJ).
Mechanical
Reset Plunger
End Link
Front of Release Device
Yellow LED
(Close Door Detection
Release Disabled)
Red LED (Line Power Present)
Bottom of Release Device
Electronic
Reset Button
Test Button
FIGURE 1
ENCLOSURE MOUNTED LEDS STATUS INDICATORS
12
LED Label LED Color Description Action Required